//
//  WBVisitorView.swift
//  新浪微博
//
//  Created by ZJ on 2017/10/12.
//  Copyright © 2017年 zj. All rights reserved.
//

import UIKit

/// 访客视图
class WBVisitorView: UIView {

    lazy var registerButton: UIButton = UIButton.init(title: "注册", fontSize: 16, normalColor: UIColor.orange, highlightedColor: UIColor.black, backgroundImageName: "common_button_white_disable")
    
    lazy var loginButton: UIButton = UIButton.init(title: "登录", fontSize: 16, normalColor: UIColor.darkGray, highlightedColor: UIColor.black, backgroundImageName: "common_button_white_disable")
    
    // MARK: - 设置访客视图信息
    /// 使用字典设置访客视图的信息
    ///
    /// - Parameter dict: [imageName / message]
    var visitorInfo: [String: String]? {
        didSet {
            guard let imageName = visitorInfo?["imageName"],
                let message = visitorInfo?["message"] else {
                    return
            }
            
            tipLabel.text = message
            
            if imageName == "" {
                startAnimation()
                return
            }
            
            iconView.image = UIImage.init(named: imageName)
            houseIconView.isHidden = true
            maskIconView.isHidden = true
        }
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func startAnimation() {
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * Double.pi
        anim.repeatCount = MAXFLOAT
        anim.duration = 15
        
        // 动画完成不删除，如果iconView被释放，动画会一起销毁！
        // 在设置连续播放的动画非常有用
        anim.isRemovedOnCompletion = false
        
        iconView.layer.add(anim, forKey: nil)
    }
    
    // MARK: - 私有控件
    private lazy var iconView = UIImageView.init(image: UIImage.init(named: "visitordiscover_feed_image_smallicon"))
    
    private lazy var maskIconView: UIImageView = UIImageView.init(image: UIImage.init(named: "visitordiscover_feed_mask_smallicon"))
    
    private lazy var houseIconView = UIImageView.init(image: UIImage.init(named: "visitordiscover_feed_image_house"))
    
    private lazy var tipLabel: UILabel = UILabel.init(text: "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有什么惊喜", fontSize: 14, color: UIColor.darkGray)
}

// MARK: - 设计界面
extension WBVisitorView {
    func setupUI() {
        backgroundColor = UIColor.init(red: 0xed, green: 0xed, blue: 0xed, alpha: 1.0)
        
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(houseIconView)
        addSubview(tipLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        tipLabel.textAlignment = .center
        
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
        let margin: CGFloat = 20
        
        addConstraint(NSLayoutConstraint.init(item: iconView,
                                              attribute: .centerX,
                                              relatedBy: .equal,
                                              toItem: self,
                                              attribute: .centerX,
                                              multiplier: 1.0,
                                              constant: 0))
        addConstraint(NSLayoutConstraint.init(item: iconView,
                                              attribute: .centerY,
                                              relatedBy: .equal,
                                              toItem: self,
                                              attribute: .centerY,
                                              multiplier: 1.0,
                                              constant: -60))
        
        addConstraint(NSLayoutConstraint.init(item: houseIconView,
                                              attribute: .centerX,
                                              relatedBy: .equal,
                                              toItem: iconView,
                                              attribute: .centerX,
                                              multiplier: 1.0,
                                              constant: 0))
        addConstraint(NSLayoutConstraint.init(item: houseIconView,
                                              attribute: .centerY,
                                              relatedBy: .equal,
                                              toItem: iconView,
                                              attribute: .centerY,
                                              multiplier: 1.0,
                                              constant: 0))
        
        // 提示标签
        addConstraint(NSLayoutConstraint.init(item: tipLabel,
                                              attribute: .centerX,
                                              relatedBy: .equal,
                                              toItem: iconView,
                                              attribute: .centerX,
                                              multiplier: 1.0,
                                              constant: 0))
        addConstraint(NSLayoutConstraint.init(item: tipLabel,
                                              attribute: .top,
                                              relatedBy: .equal,
                                              toItem: iconView,
                                              attribute: .bottom,
                                              multiplier: 1.0,
                                              constant: margin))
        addConstraint(NSLayoutConstraint.init(item: tipLabel,
                                              attribute: .width,
                                              relatedBy: .equal,
                                              toItem: nil, 
                                              attribute: .notAnAttribute,
                                              multiplier: 1.0,
                                              constant: 236))
        
        //
        addConstraint(NSLayoutConstraint.init(item: registerButton,
                                              attribute: .left,
                                              relatedBy: .equal,
                                              toItem: tipLabel,
                                              attribute: .left,
                                              multiplier: 1.0,
                                              constant: 0))
        addConstraint(NSLayoutConstraint.init(item: registerButton,
                                              attribute: .top,
                                              relatedBy: .equal,
                                              toItem: tipLabel,
                                              attribute: .bottom,
                                              multiplier: 1.0,
                                              constant: margin))
        addConstraint(NSLayoutConstraint.init(item: registerButton,
                                              attribute: .width,
                                              relatedBy: .equal,
                                              toItem: nil,
                                              attribute: .notAnAttribute,
                                              multiplier: 1.0,
                                              constant: 100))
        
        //
        addConstraint(NSLayoutConstraint.init(item: loginButton,
                                              attribute: .right,
                                              relatedBy: .equal,
                                              toItem: tipLabel,
                                              attribute: .right,
                                              multiplier: 1.0,
                                              constant: 0))
        addConstraint(NSLayoutConstraint.init(item: loginButton,
                                              attribute: .top,
                                              relatedBy: .equal,
                                              toItem: tipLabel,
                                              attribute: .bottom,
                                              multiplier: 1.0,
                                              constant: margin))
        addConstraint(NSLayoutConstraint.init(item: loginButton,
                                              attribute: .width,
                                              relatedBy: .equal,
                                              toItem: registerButton,
                                              attribute: .width,
                                              multiplier: 1.0,
                                              constant: 0))
        
        // VFL
        let viewDict = ["maskIconView": maskIconView,
                        "registerButton": registerButton] as [String : Any]
        let metrics = ["spacing": 20]
        
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[maskIconView]-0-|",
                                                       options: [],
                                                       metrics: nil,
                                                       views: viewDict))
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[maskIconView]-(spacing)-[registerButton]",
                                                      options: [],
                                                      metrics: metrics,
                                                      views: viewDict))
        
    }
}
